Tweezer house

I have improved and made a customizer for [Tweezers holder][1] by [bkRamber][2]. I have improved the hold and added ability to set widths and if desired depth of individual tweezers. Hold is strong enough to be used as a mobile unit too.

All aspects can be customized but if you have the standard tweezer set, the original stl file would be good enough.

Apart from bridging, this is an easy print.

**Version 1.1**: Added support for different depths for each tweezer. Add values to tweezer_depths to have different depths. The last one is used for the remaining houses.

**Version 1.2**: Added support for screw holes.

[1]: https://www.thingiverse.com/thing:2895116
[2]: https://www.thingiverse.com/bkRamber